package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 线程池
 */
public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService executorService = Executors.newFixedThreadPool(3);
        for (int i = 0; i < 5; i++) {
            Runnable r = new Runnable() {
                @Override
                public void run() {
                    try {
                        Thread t = Thread.currentThread();
                        System.out.println(t.getName() + "正在执行一个任务");
                        Thread.sleep(5000);
                        System.out.println(t.getName() + "执行完毕");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            };
            executorService.execute(r);
            System.out.println("将一个任务交给了线程池");
        }
//        executorService.shutdown();
        executorService.shutdownNow();
    }
}
